Question

1. Expand the following using suitable identities.
a) (x + 13)(x + 20)
b) (x + 30)(x + 30)
c) (x - 7)(x – 7)
d) (x + 1)(x-1)
e) (2 + +)(2m + )
f) (3a - 1.5) (3a + 1.5)​

Answer 1

Answer:

Step-by-step explanation:

(x+13)(x+20)

=x  

2

+20x+13x+260

=x  

2

+33x+260